Channel cutter attachment



April 23, 1940. J. FERRARA CHANNEL CUTTER ATTACHMENT Filed Jan. 5, 1938FIG 2 INVNTOR BY .JZH/v fE/PRA IPA Z 6 A7?0RNEV Patented Apr. 23, 1940 I"omen STATES PATENT OFFICE John Ferrara, Rochester, N. Y.

Application January 5, 1938, Serial No. 183,508

6 Claims.

This invention relates to channel cutter attachments for shoe repairstitching machines and has for its object to provide a novel form ofcutting mechanism for such an attachment in order that both straight andcurved. channels may be efficiently cut thereby.

This and other objects and attendant advantages will become more readilyapparent from the detailed description of the invention which follows,reference being had to the accompanying drawing in which:

Figure 1 is a perspective view of the novel channel cutter attachment. 7

Figure 2 is a perspective view of a modified form thereof.

I The channel cutter attachment forming the subject matter of my presentinvention is adapted for use with'a stitching mechanism such as isillustrated in connection with the Resoling stitching machineillustrated in my prior Patent No. 1,924,737, issued August 29, 1933.The channel cutting mechanism of this prior patent is operated by acertain reciprocating member of the stitching mechanism. My presentinvention, while also operating in conjunction with the stitchingmechanism, is driven independently thereof so that any rotating memberthereof or a separate motor may be utilized for the purpose offurnishing the driving means therefor.

As illustratedin Figure 1 of the drawing, the channel cutting mechanism'is embodied in and cooperates with the presser foot which is located atthe outer end of the bracket 2. In the bracket are provided theelongated holes 3 and 4 and the clamping screws 5 and 6 pass thru theseholes to clamp the bracket to the arm I of the stitching machine. Theholes are elongated so as to provide for ahorizontal endwise adjustmentof the bracket-2 on the arm 1. Mounted in the bracket 2 so as to beadjustable verticallythereon is the bearing block 8. This block isshaped so as to be guided in a straight line motion in the bracket.Mounted to rotate in the bracket but held against endwise movement bythe pin 9 is the adjusting screw Ill. This screw is threaded into thetop of the bearing block B so that rotation thereof causes the bearingblock to move up or down in the bracket.

Mounted to angularly slide in the bearing block is the cutting knife orchisel l I. This chisel projects from the bearing block so that on therapid reciprocation thereof the channel I2 is cut into the surface of asole [3 that is fed under the presser foot during the stitchingoperation. The cutting knife or chisel is attached to the holder l4 andthe latter is provided with the vertical cam slot IS. A crank pin l6,carriedby the crank IT, projects into the slot so that the rotation ofthe crank causes a rapid reciprocation of the knife holder and knife;The crank is carried by the shaft l8 and the latteris journaled in anextension IQ of the bracket 2. v

The shaft I8 carries the pulley and a belt 2! driven by a suitablerotating member of the stitching machine or anelectric motor is adaptedto rotate the shaft and. operate the channel cutting mechanism.

As in the resoling stitching machine, above referred to, the stitchingof the sole to the Welt is adapted to take place in the channel out. bythe cutting knife so that the stitching is embedded therein and will notbe worn off by the wearer of the shoe.

In Figure 2 I have illustrated a modified form of the channel cuttingmechanism. In this modification the channel cutter 23 is carried by anoscillating shaft 24 and projects laterally therefrom. The oscillatingshaft is mounted in the bearing block 25 and a crank'26, operated by alink -21, is adapted to impart the proper oscillating motion fromsuitable driving means. 1

In oscillating-the cutter 23 cuts laterally into the sole and in doingso forms a channel 28 similar to that producedv by the reciprocatingcutter illustrated in Figure 1.

I claim:

1. An attachment for stitching machines comprising a bracket, a presserfoot provided on said bracket, fastening means providing a horizontaladjustment for said bracket on the stitching machine, a bearing in saidbracket, a channel cutter angularly mounted in said bearing and meanscarried by said bracket for rapidly reciprocating said cutter in saidbearing.

2. An attachment for stitching machines comprising a bracket, a presserfoot provided on said bracket, a bearing block carried by said bracket,

a cutter angularly slidable in said bearing block and means carried bysaid bracket for reciprocating said cutter in said bearing block.

3. An attachment as set forth in claim 2 in which said bearing blockisvertically movable with said cutter in said bracket relative to saidpresser foot.

4. An attachment for stitching machines comprising a bracket, a presserfoot provided on said bracket, a bearing block carried by said bracket,a cutter mounted to reciprocate in said bearing block, means carried bysaid bracket and operatively engaging said cutter to cause said cutterto rapidly reciprocate, and means for Vertically adjusting said cutterwith the cutter operatively connected with said first named means.

5. An attachment for stitching machines comprising a bracket, a presserfoot carried by said bracket, a cutter mounted to reciprocate in saidbracket, rotary operating means carried by said bracket, and meansconnecting said rotary operating means with said cutter and transformingits rotary motion into a reciprocating motion for said cutter.

6. An attachmentfor stitching machines comprising a bracket, a presserfoot carried by said bracket, a cutter mounted to reciprocate in said 1bracket, means for adjusting said cutter relative to said presser foot,rotary operating means, and means connecting said rotary operating meanswith said cutter and transforming its rotary motion into a reciprocatingmotion for said cutter.

JOHN FERRARA.

